note that consideration was not given to roots graded unmarketable as a result of insect and disease damage. The incidence of root damage by soil-dwelling insects is a major problem in commercial sweetpotato production areas. Only recently have

Arthur Villordon, Don LaBonte and Julio Solis

-based system underestimated NAR, PR, and SR counts relative to the destructive sampling-based total counts. Previous work on quantifying sweetpotato transplant response using destructive sampling-based AR counts included such experimental treatments as virus

Samuel F. Hutton and John W. Scott

sweetpotato whitefly ( Bemisia tabaci ), the strains that cause Tomato yellow leaf curl virus (TYLCV) are the most widespread and well known. Begomovirus resistance in Fla. 7907C is conferred by the Ty-1 gene, which was advanced using marker

zucchini squash, Coolong (p. 296) found that even without virus or disease pressure, yields of both yellow and zucchini squash were more than 30% lower in the fall than in the spring, despite similar numbers of harvests. The consistency of these findings